Grinding-mill



- 3 Sheets-Sheet 1. G. K. SMITH. GRINDING MILL.

No Model.)

' Patented Feb.2,1886.

3 Sheets-Sheet 2.

(No Model.)

G. K. SMITH.

GRINDING MILL.

No. 335,391. Patented Feb. 2, 1886.

ma Q5585 F1 W I (No Model.) 3 Sheets-Sheet 3.

G. K. SMITH.

GRINDING MILL. No. 335,391. Patented Feb. 2, 1886.

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NITED STATES GEORGE K. SMITH, OF CHICAGO, ILLINOIS.

GRINDING-MILL.

SEBQIPICATION forming part of Letters Patent No. 335.391, dated February2,1886. Application filed October 1%, H185. Serial No. 179,780. (Nomodel) To all whom it may concern.-

Be it known that I, GEORGE K. SMITH, residing at Chicago, in the countyof Cook and State of Illinois, and a citizen of the United States, haveinvented a new and useful Improvement in Grinding-Mills, of which thefollowing is a full description, reference being had to the accompanyingdrawings, in which Figure l is a plan of the mill. Fig. 2 is a sideelevation, a portion of the box and frame on which the mill is mountedbeing cutaway, also a portion of the master-wheel. Fig. 3 is a top viewof the spider. Fig. 4. is a side ele- Fig. 5 is a section of themeal-box at line :0 of Fig. 1, showing the mill in elevation. Fig. 6 isan enlarged detail of parts shown, and hereinafter more particularlyspecified. Fig. 7 is a side elevation of one of the spur-wheels with itspinion. Figs. 8, 9, 10, and 11 are details of parts shown, andhereinafter more particularly specified.

My invention consists in new devices for supporting and. holding inplace the masterwheel, whereby I reduce friction, and in certain newcombinations, all as illustrated in the accompanying drawings, andherein described.

Those things which I claim as my invention will be pointed out in theclaims.

In the drawings, A B represent two heavy pieces of plank or timber whichform the sides of a box and frame upon which the mill is mounted. C Dare the end pieces of such box or frame.

a are the rods. E is the bottom of the box.

F is a casting, which may be called a spider. It is secured at threepoints to the box or frame;

b are bosses, one on the upper side of each of the arms of the spider,which spider has a central hole, 0, to receive the shaft which carriesone of the grinding-disks.

d are pins secured in the spider F, one in each arm.

G is the master-wheel. It is provided with cogs on its inside, and has aprojecting flange, e, at its top.

H are three spur-wheels, each of which is provided with a pinion, f,cast therewith, which pinions f engage with the gear upon the inside ofthe masterwheel, such spurwheels and pinions being supported on the pinsd.

I is a case in which the grinding-disks are located. Extending downwardfrom this case are three arms, J, the lower ends of which are turnedoutward, and are secured to the pins (Z by means of nuts The ends ofthese arms rest on shoulders h on the pins d. Each of the arms isprovided at its lower and outer end with a vertical roller, i, whichrotates upon a pin secured to said arm J.

K are two castings bolted to the frame, and carrying at their upper endsrollersj, arranged. to receive the flange e. j is another rollersupported by a bar, n. The master-wheel is supported by these rollersjj.

L is the shaft which carries one of the grind ing-disks.

M is a pinion on the shaft L, arranged to engage with the threespur-wheels H.

N is a bevel-wheel on the lower end of the shaft L, which wheel engageswith a small bevel-wheel, 0, upon ashaft, Z, supported in hearings inthe arms is, which project downward from the spider F.

P are devices which form a bearing for the shaft L. This construction isshown substantially in a former patent granted to me, and need not herebe more fully described.

Q is a discharge spout, the delivery end of which is arranged betweentwo of the spurwheels H on the inside of the master-wheel. 777. is aprojection on the top of the case to receive a hopper.

R are bars secured to the master-wheel, which bars form a sweep to whichanimalpower may be attached. One of the grind ing-disks may be securedto the shaft L, and the other may be upon the inside of the top of thecase, as is common, and the lower grinding-disk can be raised andlowered in any suitable manner. As shown, this can be done by raisingand lowering the part P by means of an arm and screw-rod, substantiallyas shown in my former patent.

The bevel-wheels N O and shaftl are de signed to be used to transmitpower for use outside of the grinding-mill, as is customary.

The master-wheel in this present construction is supported upon therollers jj and revolves beneath the rollers The pinions f engage withthe cogs on the inside of the master-wheel, and the spur-wheels H engagewith the pinion M, and as the pinions f and spurwheels H are secured toeach other the maspins d they do notinterfere with the free movement ofthe pinions f upon these pins (1. Where the master-wheel is formed witharms, the material from the grinding-stones cannot be delivered asconveniently as where the construction herein described is used.

By dispensing with arms on the masterwheel and arranging spur-wheels, asindicated,

, the lower end of a discharge-spout is brought inside of themaster-wheel and discharges the product of the mill into a box below themaster-wheel and gearing. This feature is of considerable importance inactual use.

As shown, the lower end of the deliveryspout is located inside of themaster-wheel and between two of the spur-wheels.

What I claim as new, and desire to secure by Letters Patent, is

1. In agrinding-mill, the combination,with a main frame or spider, F,shaft L, and pinion in, of an internally-geared open master-wheel, gearsfor transmitting motion from said wheel to said pinion, arms J, and acase, I, containing grinding-burrs and supported by said arms Jcentrally above said master-wheel, substantially as described.

2. In a grinding-mill, the combination of spider F, arms J, pins d,connecting said spider and arms, master-wheel G, shaft L, and pinion m,spur-wheels H,meshing with pinion m, pinions f, connected with saidspur-wheels and engaging themaster-wheel, and case I, supported on armsJ and containing a stationary and a movable grinding-disk, substantiallyas described.

3. In a grinding-mill, the combination of master-wheel G, case I,containing a stationary and a movable grinding-disk, and arms J, havingtheir lower ends turned outwardly and provided with rollers z, bearingagainst the master-wheel, and at their upper ends supporting the case I,substantially as described.

4. A grinding-mill comprising a masterwheel, arms J, a case, I,supported by said arms and containing a stationary and a movablegrinding-disk, a shaft, L, provided with pinion m, spur-wheels H,meshing with said pinion, pinionsf, connected with said spurwheels andactuated from the master-wheel, and a delivery-spout leading from thecase I down between two of the spur-wheels to discharge into areceptacle below the masterwheel, substantially as described.

GEORGE K. SMITH.

Witnesses:

ALBERT H. ADAMS, HARRY T. J ones.

